- High speed steel
- CNC-machined to .0003" T.I.R. or less
- Two layer Nitrite-Bronze coating prevents galling
- Ideal for any Bridgeport-type (collet driven) machine
- Center accurately in the guide
- Cutting angle prevents the bit from wandering due to irregular guide wear
- Flutes are designed to enlarge bores quickly
- 1/2" shank with flat
- 65 to 67 Rc hardnesss